Effective electrochemical water oxidation to H2O2 based on bimetallic Fe/Co metal-organic framework

IF 3.2 Q2 CHEMISTRY, PHYSICAL Energy advances Pub Date : 2024-09-16 DOI:10.1039/d4ya00477a

Kunpeng Liu, Xu Wang, Nan Wang, Ruiyong Zhang, Meinan Yang, Baorong Hou, Wolfgang Sand

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Abstract

Rationally designing high-efficiency catalysts for electrochemical two-electron water oxidation reaction (2e- WOR) to produce hydrogen peroxide (H2O2) is extremely important, while designing bimetallic metal-organic framework (MOF) is of great significance for effective 2e- WOR. Herein, MIL-53(Fe) and different proportions of Co doped MIL-53(Fe) were prepared by hydrothermal method. The structural characterization and elemental analysis showed that the Co ions were successfully doped into MIL-53(Fe) to form MIL-53(Fe/Co) bimetallic MOF, and the morphology of MIL-53(Fe/Co) became more regular after Co doping. We found that the optimized MIL-53(Fe/Co) exhibits remarkable 2e- WOR performance, which gave an overpotential of 150 mV at 1 mA cm-2. The overpotentials of MIL-53(Fe/Co) was approximately 220 mV (at 1 mA cm-2) lower than MIL-53(Fe), which may attribute to the change of microstructure of MIL-53(Fe) after Co doping and the synergistic effect between Fe/Co. Our work introduces a strategy for designing bimetallic MOF-based electrocatalysts, opening up new possibilities for efficient 2e- WOR systems.

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基于双金属 Fe/Co 金属有机框架的有效电化学水氧化 H2O2

合理设计电化学双电子水氧化反应（2e-WOR）生成过氧化氢（H2O2）的高效催化剂极为重要，而设计双金属金属有机框架（MOF）对有效的 2e- WOR 具有重要意义。本文采用水热法制备了 MIL-53(Fe)和不同比例的 Co 掺杂 MIL-53(Fe)。结构表征和元素分析表明，Co 离子成功掺杂到 MIL-53(Fe)中形成了 MIL-53(Fe/Co)双金属 MOF，掺 Co 后的 MIL-53(Fe/Co) 形貌变得更加规整。我们发现，优化后的 MIL-53(Fe/Co)具有显著的 2e- WOR 性能，在 1 mA cm-2 时的过电位为 150 mV。MIL-53(Fe/Co) 的过电位比 MIL-53(Fe) 低约 220 mV（1 mA cm-2），这可能是由于掺入 Co 后 MIL-53(Fe) 的微观结构发生了变化以及 Fe/Co 之间的协同效应。我们的工作介绍了一种设计基于双金属 MOF 的电催化剂的策略，为高效 2e- WOR 系统开辟了新的可能性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Energy advances

CiteScore

1.80

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